Vidulk is an AI-powered mobile app for iOS and Android that turns long videos and audio into viral short-form clips. It also includes an AI image studio and professional caption editor.

How does AI clip detection work?

Import a video or paste a link — Vidulk transcribes the audio using AI speech recognition that supports 99 languages, then analyzes the transcript to find the most engaging moments. Each clip is scored by virality potential and categorized as Insight, Story, Funny, Tactical, Controversial, or Emotional.

What languages does Vidulk support?

Vidulk supports speech recognition in 99 languages including English, Spanish, French, German, Korean, Japanese, Chinese, Arabic, Hindi, Portuguese, and many more. The app interface is available in over 30 languages. Language is detected automatically.

What caption and editing features are available?

Vidulk includes 7 caption styles (Highlight, Karaoke, Typewriter, Minimal, Bold Pop, Gradient, and more), customizable fonts, colors, and animations. Export in multiple aspect ratios (9:16 for Shorts/Reels, 1:1 Square, 4:5 Portrait, 16:9 Landscape) at up to 4K resolution.

What is the AI Image Studio?

AI Studio lets you generate thumbnails and images from text prompts with 6 artistic styles including Realistic, Illustrated, Abstract, Minimalist, Anime, and Watercolor. It also includes an Image Enhancer that upscales images 2x or 4x. All processing happens on-device for privacy.

What content types does Vidulk work with?

Vidulk is optimized for podcasts, YouTube videos, interviews, lectures, gaming highlights, vlogs, music, sports, and news content. Import from YouTube, TikTok, Instagram, Twitter/X, Facebook, or upload directly from your camera roll.

Does Vidulk work with long videos?

Yes. Vidulk handles videos of any length. Short videos are processed on-device, while longer videos (over 5 minutes) are processed using server-side AI for faster and more reliable results.

What platforms is Vidulk available on?

Vidulk is available on both iOS (App Store) and Android (Google Play Store). The app interface is available in over 30 languages.

Yes. Video transcription and AI image processing happen on-device. Your videos are not stored on external servers permanently. You can delete your account and all data at any time from the app settings.

Can I use Vidulk for audio-only content like podcasts?

Yes. Vidulk fully supports audio-only content. Import MP3, M4A, WAV, or other audio files. AI detects the best moments and you can add AI-generated background images or choose from 1,200+ built-in backgrounds to create video clips from audio.

Can Vidulk remove captions or subtitles from videos?

Yes. Vidulk includes AI-powered caption removal that automatically detects and removes burned-in captions and subtitles from your videos before clipping. It works best with dynamic/moving captions like those on TikTok, Reels, and YouTube. Enable it with a simple checkbox when importing your video. Processing takes 7-20 minutes and uses additional credits based on video length.

How do I export clips from Vidulk?

After editing, choose your aspect ratio (9:16, 1:1, 4:5, or 16:9), resolution (720p, 1080p, or 4K), and export. Clips are saved directly to your Photos library and can be shared instantly to any platform.

How to Turn Webinar Recordings into TikTok Clips

To convert a webinar into TikTok-ready clips, extract the most engaging moments, crop to 9:16 vertical, and add captions - Vidulk’s AI Clipper streamlines this process.

Webinar to TikTok Clips: How to Create Vertical, Captioned

What TikTok Requires for Webinar Clips

Aspect Ratio: 9:16 vertical is recommended for TikTok, sized at 1080x1920 pixels for best results. 1:1 and 16:9 are accepted but less ideal for in-feed viewing.
Clip Length: Up to 60 minutes per upload (as of August 2026), but shorter clips (15 - 90 seconds) typically perform better for engagement.
Captions: TikTok offers built-in auto captions, but pre-burned captions ensure accuracy and accessibility.

How to Clip Webinars for TikTok Manually

Review your webinar recording and identify 1 - 3 key moments: a sharp tip, a live demo, and a standout Q&A answer.
Use video editing software to crop the video to 9:16. If your source has slides and a speaker, create a split-screen with both visible.
Add clear, readable captions. Place them where they won’t cover important visuals.
Export in 1080x1920 (vertical) MP4 format, ready for TikTok upload.

How Vidulk’s AI Clipper Automates the Process

Open Vidulk’s free AI Clipper app on iOS or Android.
Paste your full webinar video link or upload the file.
The AI automatically detects the best moments - tips, demos, and Q&A highlights.
Vidulk crops the video into vertical 9:16 format, splitting slides and speaker as needed.
Auto-generated captions are added, sized for TikTok’s viewing area.
Export the finished, captioned vertical clips directly to your device, ready to post.

Best Practices for Webinar to TikTok Clips

Keep clips focused on a single actionable insight or answer.
Ensure the speaker’s face and any key slide content are visible in the vertical crop.
Use concise, easy-to-read captions for accessibility and engagement.
Test a few different moments to see which resonate most with your TikTok audience.

Vidulk's AI clipper (free to start, iOS + Android) finds the best moments in a long video and exports captioned vertical clips sized for the destination.

Try Vidulk

FAQ

How do I crop a webinar video to vertical for TikTok?

Use video editing software to set the aspect ratio to 9:16 (1080x1920 px) and frame the speaker and slides. Vidulk’s AI Clipper automates this step.

What moments from a webinar work best for TikTok clips?

Highlight sharp tips, live demo segments, and Q&A answers. These engage viewers and fit TikTok’s fast-paced style.

Does Vidulk add captions to my TikTok clips?

Yes, Vidulk’s AI Clipper automatically generates and burns captions onto your vertical clips, sized for TikTok.

What is the ideal video length for TikTok webinar clips?

While TikTok allows up to 60 minutes, clips between 15 and 90 seconds usually perform best for engagement.

Can I use Vidulk for free?

Vidulk’s AI Clipper is free to start, available on iOS and Android. Additional features or watermark removal may require a code.